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Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films

Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films
Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films
Mesoporous silica films with vertically aligned hexagonal pores have been produced via the electrochemically assisted surfactant assembly (EASA) method using cetyltrimethylammonium bromide (CTAB) surfactant. Mesoporous silica powder has also been synthesised using the same surfactant. The pore walls of the silica powder and films have been grafted with organosilane reagents. The size of the pore, degree of grafting and effect on the properties of the pore have been investigated using porosimetry, contact angle, NMR and CHN analysis. The degree of grafting was found to be dependent upon the size of the grafting agent, with the smallest steric bulk grafting most effectively. It was found that that the grafting of the pores with Me3SiCl greatly increased the hydrophobicity of the pore and reduced water penetration. Grafting with larger groups caused the film surface to be hydrophobic but had little effect on the penetration of water into the pores.
2046-2069
113432-113441
Robertson, Calum
ae7c13b2-0575-4579-8290-94922544f742
Lodge, Andrew W.
2612eca4-d8bd-4029-9ccc-19a54c22619a
Basa, Peter
f031b97b-ebf8-47d7-bdcf-323f4a13dffb
Carravetta, Marina
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Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Kashtiban, Reza Jalili
2f5a8273-36e9-4baf-81c7-d59567eb0b35
Sloan, Jeremy
30ae48dd-fe5d-402c-bb7b-ea7b0af29b99
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
Spencer, Joseph
4ae3c181-002e-491d-a9c3-8936062a49c8
Walcarius, Alain
fb49aa57-26e0-4111-bf8e-f75cd5b6c3e8
Robertson, Calum
ae7c13b2-0575-4579-8290-94922544f742
Lodge, Andrew W.
2612eca4-d8bd-4029-9ccc-19a54c22619a
Basa, Peter
f031b97b-ebf8-47d7-bdcf-323f4a13dffb
Carravetta, Marina
1b12fa96-4a6a-4689-ab3b-ccc68f1d7691
Hector, Andrew L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Kashtiban, Reza Jalili
2f5a8273-36e9-4baf-81c7-d59567eb0b35
Sloan, Jeremy
30ae48dd-fe5d-402c-bb7b-ea7b0af29b99
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
Spencer, Joseph
4ae3c181-002e-491d-a9c3-8936062a49c8
Walcarius, Alain
fb49aa57-26e0-4111-bf8e-f75cd5b6c3e8

Robertson, Calum, Lodge, Andrew W., Basa, Peter, Carravetta, Marina, Hector, Andrew L., Kashtiban, Reza Jalili, Sloan, Jeremy, Smith, David C., Spencer, Joseph and Walcarius, Alain (2016) Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films. RSC Advances, 6, 113432-113441. (doi:10.1039/C6RA23059H).

Record type: Article

Abstract

Mesoporous silica films with vertically aligned hexagonal pores have been produced via the electrochemically assisted surfactant assembly (EASA) method using cetyltrimethylammonium bromide (CTAB) surfactant. Mesoporous silica powder has also been synthesised using the same surfactant. The pore walls of the silica powder and films have been grafted with organosilane reagents. The size of the pore, degree of grafting and effect on the properties of the pore have been investigated using porosimetry, contact angle, NMR and CHN analysis. The degree of grafting was found to be dependent upon the size of the grafting agent, with the smallest steric bulk grafting most effectively. It was found that that the grafting of the pores with Me3SiCl greatly increased the hydrophobicity of the pore and reduced water penetration. Grafting with larger groups caused the film surface to be hydrophobic but had little effect on the penetration of water into the pores.

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More information

Accepted/In Press date: 31 October 2016
e-pub ahead of print date: 11 November 2016
Organisations: Electrochemistry, Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 402807
URI: http://eprints.soton.ac.uk/id/eprint/402807
ISSN: 2046-2069
PURE UUID: d81869bc-0516-4679-9f7c-e8fb04813da5
ORCID for Andrew W. Lodge: ORCID iD orcid.org/0000-0001-5004-208X
ORCID for Marina Carravetta: ORCID iD orcid.org/0000-0002-6296-2104
ORCID for Andrew L. Hector: ORCID iD orcid.org/0000-0002-9964-2163

Catalogue record

Date deposited: 15 Nov 2016 16:17
Last modified: 26 Nov 2021 05:06

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Contributors

Author: Calum Robertson
Author: Andrew W. Lodge ORCID iD
Author: Peter Basa
Author: Reza Jalili Kashtiban
Author: Jeremy Sloan
Author: David C. Smith
Author: Joseph Spencer
Author: Alain Walcarius

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